Water-control mechanism for concrete mixers



Jan. 24, 1928.

1,657,099 G. E. WEBB WATER CONTROL MECHANISM FOR CONCRETE MIXERS 2 Sheets-Sheet 1 lVl/ENTOR fieal'gelTWebb Jan. 24, 1928. 1,657,099

G. E. WEBB WATER CONTROL MECHANISM FOR CONCRETE MIXERS Filed July 14, 1927 2 Sheets-Sheet 2 Patented Jan. 24, 1928.

GEORGE EVANS WEBB, on.

PANY, 01;

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seem l mp1s W1 Hi wesee;

Co rete mix gome hie s vi st n 9 m in nt-i b d nteeep y apne e. xing ru l ad ki p lyin ry g es t t e d um 1 n qnla w enki 9 S pply 'o the necessarywater forming apart-of every batch of mixed concrete, and suitable nieens is harg the dru' u the C p ely In lnz ehinesjof the above class require s mie heeomi g H 9 and were tr in relation to insuringg0od conerete a nd these requirements take into amount-the ne oessity for aocureteiy p 'opo tt-ioning the Water the oer n'ent contents of the mixed ega es Withe view tosuhserving the objeehoi rstlely m nta ni PTO??? Wa cementira tio, and nore speoifioally in order. to. preventthe passage of water from the water snpply lneansto the mixing di um un til there isan ample and aeeuretely detei nedgqlfwnt y o t r tof eg pp i d h present inyentionihas been leyolved. r f

In he car y ng out of my inv nt n '1. i e sef yior c n p t o si he e y. t el kip w i che 1them ne 1m w th the dry aggregates cannot be operatjetlto perform the ahovefiunction until there is ufie ntt W t r 'f LWf r upp y ta o. dm d w th h ag ates when the reach the drum. The "looking" provisions above referred to alfieeontrolledhya special type of pressure controlling eontrivanoe ogereted by the pressure in the lnain supply line which carries the waten tofthe mixing mwater Supply sn w s i nv n n Will Pre e ther io i iihe verte t r purpo e m x n i: bat e f e e iin wonfc ete m x r; 'Whfih a 11 i: oient-s'upplyof Water to maintain a predete mined water- Cement ratio is not at- 11and and ready to be fed" to the. mining drnm W t e. qr go e nd o he Ob s i W, my nv ti n; i fully. e i nted n t e Figurel is n'edneecl side viewofa conerete mlxingfma eh ne of the type to which FiguieQ is anenlarged side iew showing t morelclearly thevl oeking devlce whlch e0 opefa tes" with the dutch? operating means used to control the eseent end ciescent 'fof the loading skip ofthe mix er.

Figure" is afl'ontfvieti the inztin p a ts shown in Figui e 2;

Figure is a delteiled view showing more clearly the pressure eontrollingdevicehfoi the loeking;cont-i'it anee. l

Figure 51s a top plan iew of the conti ol devicgparts being broken away.

' iince to those erse d in the Lari; the general construction of conel'ete mixing machines in use toldaylis understood, it is only necessary to refer generally tofsueh maehines as cornprisinga arm A, '21 lee cling skip B, czihles (Tfor raising Sitid skip, end editable clutch means D fol thfowinglnto uotwnend're leasing the' ea ble operating drum' whereby to raise *anaiower, respectively; the skip. In

' conjnnotionwith'theineohinethere is usually provided wa'telfl upply tank having a' disehai'ge 'pi pe" leadingfinto 'theldrnnito supply water there co, said .tzi nliheing filled-- ntiegular int-elwals as customh ry, with Water 'beepipeleading to any sonrce of supply of wz tt i nndef ressu e; 11 offthe; foregoing feati1rsTefejold in the rift and are gfehilili fiech'by United States Letters Patent to N o. 1,328,635, issued J mery For the opefat ion of the clu teh D, I empivoted si pport ingj b 'alek et sof the lozidin gf skip 9jwhen seigl skip reaches a certain point in itsnpwardgmoye mm in charging its con tentsintd thedrnm o f the mixer. The pu'rpose of the"oooperzitionoftheipe tsh and? h vis to enable the movement of the skipesit reaches nfipep liniitht o knee}; out the clutch and discontinue the upward pull of the cables C, thus causing stoppage of the skip movement at charging position.

My invention largely comprises the provision of a lock member 10 arranged to engage the lever 4, as seen in Figure 2, and pivotally mounted at 11 on a bracket 12. The bracket 12 supports a pressure diaphragm casing 13 containing, as seen in Figure l, the pressure diaphragm 14 adapted to be acted on atits upper side by pressure of water supplied to the casing 13 by a pipe- 15 which leads ofi' to a point of connection 16 with the water supply main 1.; Pipe 15 may be provided with a cut-ofi'valve 17 in its length.

i 20 on the locking member 10. A drain and pressure gauge supporting pipe 21 extends also from the casing 13 and is equippedwith a drain a cook 22 and the pressure gauge 23.

lVith the parts of my inventioncon-y structed as stated, the operationis as follows: Assuming that the water supply tank E is filled with the water necessary for a batch of ,concretetobe mixed by the mixing drum raise theskip 9 there is not sufficient water, in the tank E tobe used for the batchto be mixedin the drum the condition will \iIlVOlVQ the passing of the water from the main 1 tovthe tank E. hen thewaterli passing from I the water main, 1 to the tank E thepressure in the it'ormeris lowered,

and, immediately said pressure, is lowered, as willbe the case under the condltionnow described, the spring 18 will force the dia-lv phragm 14: upwards and raise thelock mem ber 10 to a position engagingthe knockout lever/l. \Vhile in such position as is shown in Figure 2, the operator of thermachine cannot throw theclutcli leyer 2 so as to raise theskip. Assoon as the tank E has filled from the water main 1 the full pres; surein the main 1 is restored and willrpass through the pipe 15 to the diaphragm casing 13 and actuate the diaphragm to lower the lock member, 10 in self evident manner.

/Vhen so lowered, of course, the operator may freely shift the lever 2 to clutch D and raise the skip 9 K Having thus described my invention what I claim as new, and desire to secure throw on the The diaphragm 14; is normally uppressed by a spring 1 8,and a rod 19connect's the diaphragm 14 with a projection by Letters Patent of the United States, is

1. In a concrete mixing machine, in combination, a mixing drum, a charging means for supplying aggregates to the drum, "water supply means for the drum, operating means for causing the charging means to supply aggregates to the drum, and instrumcntalb ties for preventing operation oil the last mentioned means when a suliicient quantity of water is not available at the water supply means for properly charging a the mixing drum wlth an adequate amount of such water as required by the batch to be mixed in said drum.

2. In a concrete mixing machmc, 111 combination, a mixing drum, a Water supply therefor, means to charge aggregates into the drum, and mechanism for preventingoperation of said charging means when an insutlicient amount of water is available at the water supply for effecting a proper admixture of aggregates and Water in the drum.

3. In a concrete mixingmachine, incom bination, a mixing drum a water supply main therefor, an aggregates charging s ip for said mixing drum, and means controlled by pressure in the water supply main. for governing the action oi: the aggregates charg ing skip. v

i l. Ina concrete mixing machine, in combination, a mixing drum, an aggregates charging skip therefor, a water tank, a watcr supply main forthe tank, hoisting means for operating the skip, and means controlled by pressure within the main for governing the operation of the hoisting means for die skip.

In a concrete mixing naachhie;incombination, amiking drum, an aggregates] charging skip therefor, a water tank,.a water a supply main tor thetank, hoisting means for operating the skip, and meanscontrolled by pressure within the main for governing the operation ofthe hoisting means for theskip, including a locking device and a pressurd operated diaphragm connected therewith,

the hoisting meansfior the skip includiiig member.

6.111 a concrete mixing machine, in comclutch mechanism controlled by said locking bination, a mixing drum, a loadingskiplf therefor, a water tank to supply water to the drum, a water supply main connected with the tank, clutch mechanism amenablling the raising of the skip, a lock device for by'variation ofpressure in the water supply said clutch mechanis mand means controlled main for governing the action of said lock ing device to render it operative on tl eclutch mechanism when insufficient water is in the supply tank to meet theTrequirementsfor predetermined mixing in the drums and for I releasing said clutch mechanism when there is ample water in the supply tank for use with a required batch mixture in the drum.

7. In a concrete mixing machine, in combination, a mixing drum, a Water supply tank therefor, a supply main leading to said tank, a loading skip, clutch mechanism for hoisting said skip, a lock for engaging the said clutch mechanism for preventing hoisting action thereof, a pressure device, including" a pressure diaphragm, connected With said 100k device to operate the same, means for conducting pressure from the Water supply main to said diaphragm to act thereon, and means to operate the diaphragm to render the lock device inactive on reduction of pressure acting on said diaphragm.

In testimony whereof I afiix my signature.

GEORGE E. WEBB. 

